We have this dream of having a backyard with a big sheet or screen where we invite friends over and watch movies on summer nights. We don't have a backyard, but for those of you who might, how about throwing a movie birthday party? We found all the info you need at Celebrations.com
including possible themes and hints on looking to rent a projector. (Or you could buy one- we've read good things about the Epson Moviemate 30S).
A few things you'll want to have around: bug spray, blankets and pillows, and popcorn. And...you might want to give the neighbors a heads up.
Pic via La Lunas World .